Abstract: In a wrist-carried camera having a watch function, a body including a taking lens is provided in such a manner as to freely rotate with respect to a band part through a rotation mechanism, and a release switch is provided at the unrotated band part. Setting a camera mode stops the hands of the watch in the direction of a taking lens so as to display an image-capturing direction. A rotary bezel is arranged around a display part, and marks indicating modes of the camera are formed on the bezel. A hand of the watch is also used as an indicator for pointing the mode display mark in the bezel. Setting the mark in the bezel to the indicator switches and displays the operation modes.

Abstract: In a wrist-carried camera having a watch function, a body including a taking lens is provided in such a manner as to freely rotate with respect to a band part through a rotation mechanism, and a release switch is provided at the unrotated band part. Setting a camera mode stops the hands of the watch in the direction of a taking lens so as to display an image-capturing direction. A rotary bezel is arranged around a display part, and marks indicating modes of the camera are formed on the bezel. A hand of the watch is also used as an indicator for pointing the mode display mark in the bezel. Setting the mark in the bezel to the indicator switches and displays the operation modes.

Abstract: In a wrist-carried camera having a watch function, a body including a taking lens is provided in such a manner as to freely rotate with respect to a band part through a rotation mechanism, and a release switch is provided at the unrotated band part. Setting a camera mode stops the hands of the watch in the direction of a taking lens so as to display an image-capturing direction. A rotary bezel is arranged around a display part, and marks indicating modes of the camera are formed on the bezel. A hand of the watch is also used as an indicator for pointing the mode display mark in the bezel. Setting the mark in the bezel to the indicator switches and displays the operation modes.

Abstract: A device for protecting a secondary battery from overcharge and overdischarge has two switches and two diodes respectively connected in parallel with the switches. Each diode is conductive in the same direction as a parasitic diode included in the associated switch. When one of the switches is turned off, a current flows through the diode connected to the switch prior to the parasitic diode of the switch. This prevents a current from flowing through the switch in the opposite direction. The switches are, therefore, free from deterioration and damage and allow the protection device to surely operate without being damaged. Alternatively, a charge path and a discharge path may be connected in parallel with each other, and each may have a serial connection of a switch and a diode opposite in direction to a parasitic diode included in the switch.

Abstract: A velocity control device is disclosed having feedforward signal applied to a velocity servo loop. An actuator moves a laser beam spot to a desired track of an optical disk. A displacement of the laser beam spot outputted from the actuator is differentiated by a differentiator and converted to a signal corresponding to the velocity of the movement of the laser beam spot. A signal corresponding to a distance from the present position of the laser beam spot to the desired track is obtained from the displacement and a desired count value, and is inputted to a function generator to thus obtain a square root of the distance. The difference between the square root of the distance and the moving velocity is obtained by a substracter, and a feedforward signal is added to the difference. The feedforward signal is obtained by differentiating a velocity profile with respect to time with a differentiator.